blockquote {
    background: #f9f9f9;
    border-left: 10px solid #ccc;
    margin: 1.5em 10px;
    padding: 1em 10px .1em;
    quotes: "\201C" "\201D" "\2018" "\2019";
}

.markdown-content img {
    height: 300px;
    width: 500px;
}